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Calculate the expected change in temperature for 4.5 g of NH4NO3 dissolved in 100.0 mL of H20. Assume that the calorimeter absorbs no heat. (ie. Ccal=0)
what is the average density of the sun in units of grams per cubic centimeter? The volume of a sphere is (4/3)?^3.
Consider the chemical bonds found in the white solid, potassium hydrogen phosphate, K2HPO4. For each bond specified, choose the best description from the list of types below.
suppose a can contains gas at a pressure of 755 mm hg and a temperature of 25 degrees celsius what would be the
Calculate (a). the kilograms of water per minute needed to remove the sulfur dioxide assuming that the exit water is in equilibrium with the entering gas and (b) the ratio of the water stream to the gas stream. The Henry's law constant for sulfur ..
propane reacts with oxygen in the air to produce carbon dioxide and water. In a particular experiment, 38.0 grams of carbon dioxide are produced from the reaction of 22.05 grams of propane with excess oxygen.
Starting with 33 moles of O2 in a bottle, calculate the volume of O2 the bottle could deliver to a climber at an altitude where the temperature is -38 degrees Celsius and the atmospheric pressure is 0.37 atm
A Researcher reads directions that call for addition of 25.0 mL of anhydrous ethanol (ethyl alcohol). From among the bottles in the lab, which one should she select
The complex formed between Cu(I) and 1,10 phenanthroline has a molar absorptivity of 7000 L cm-1 mol-1 at 435 nm, the wavelength of maximum absorption.
What is the system? What is the surrounding? In what direction does the heat flow? Is the process endothermic or exothermic?
67 g of ice at 0 degree C added to a sample of water at 6 degrees, all the ice melts and decreases to 0 degrees. how many grams of water was in the sample?
Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.100 M phosphoric acid solution.
What can you conclude from these results? -- Need 4 of them because I'm lost. Also, how can I estimate the useful range of a pH meter?
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